The SQLite documentation page has a great section named SQLite Technical/Design Documentation with articles on the internals of SQLite. I think it's essential to read and understand those before you start reading the source code itself.
There are many gems there, but the most interesting for you is probably Architecture of SQLite, as its description says:
An architectural overview of the SQLite library, useful for those who want to hack the code.
That page contains a nice block diagram of SQLite's code:
And then explains where in the source to find the implementation of each such block.
Another great resource (linked from here) is the Oreilly mini-book ("Short Cut") named "Inside SQLite" which goes into the design and code of SQLite to explain how it works.
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SQLite 文档页面有一个很棒的部分，名为SQLite Technical/Design Documentation包含有关 SQLite 内部结构的文章。我认为在开始阅读源代码本身之前阅读并理解这些内容非常重要。
其中有很多精彩内容，但对您来说最有趣的可能是 SQLite 架构，如其描述说：
该页面包含 SQLite 代码的漂亮框图：
然后解释在源代码中的何处可以找到每个的实现这样的块。
另一个很棒的资源（链接自此处）是 Oreilly 迷你书（“Short Cut”），名为“Inside SQLite”深入 SQLite 的设计和代码，解释其工作原理。
The SQLite documentation page has a great section named SQLite Technical/Design Documentation with articles on the internals of SQLite. I think it's essential to read and understand those before you start reading the source code itself.
There are many gems there, but the most interesting for you is probably Architecture of SQLite, as its description says:
That page contains a nice block diagram of SQLite's code:
And then explains where in the source to find the implementation of each such block.
Another great resource (linked from here) is the Oreilly mini-book ("Short Cut") named "Inside SQLite" which goes into the design and code of SQLite to explain how it works.